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Variability of time series barbell kinematics in elite male weightlifters
INTRODUCTION: Barbell kinematics are an essential aspect of assessing weightlifting performance. This study aimed at analyzing the total variability of time series barbell kinematics during repeated lifts in the snatch and the clean and jerk at submaximal and maximal barbell loads. METHODS: In a tes...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10534034/ https://www.ncbi.nlm.nih.gov/pubmed/37780124 http://dx.doi.org/10.3389/fspor.2023.1264280 |
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author | Sandau, Ingo Langen, Georg Nitzsche, Nico |
author_facet | Sandau, Ingo Langen, Georg Nitzsche, Nico |
author_sort | Sandau, Ingo |
collection | PubMed |
description | INTRODUCTION: Barbell kinematics are an essential aspect of assessing weightlifting performance. This study aimed at analyzing the total variability of time series barbell kinematics during repeated lifts in the snatch and the clean and jerk at submaximal and maximal barbell loads. METHODS: In a test-retest design, seven male weightlifters lifted submaximal [85% planned one-repetition maximum (1RMp)] and maximal (97% 1RMp) loads in the snatch and the clean and jerk during training. Barbell trajectory, vertical velocity, and vertical acceleration were determined using video analysis. Standard error of measurement (SEM), intraclass correlation coefficient (ICC), and smallest real difference (SRD) were used to determine the total variability during the lifts. Hedge's g effect size was used to assess differences in SEM between submaximal and maximal loads. RESULTS: The main findings indicated that variability—in particular for the barbell velocity—was lower at maximal compared to submaximal barbell loads (g = 0.52–2.93). SEM of time series data showed that variability increased in the snatch and the clean and jerk from the 1st pull/dip to the catch position irrespectively of the barbell load. DISCUSSION: This study presents values of total variability of time series barbell kinematics during the snatch, the clean, and the jerk. Further, the SRD can be used to evaluate changes in barbell kinematics in response to training. In addition, when interpreting barbell kinematics, coaches should take into account that the variability of barbell kinematics can vary depending on the exercise and the barbell load. |
format | Online Article Text |
id | pubmed-10534034 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-105340342023-09-29 Variability of time series barbell kinematics in elite male weightlifters Sandau, Ingo Langen, Georg Nitzsche, Nico Front Sports Act Living Sports and Active Living INTRODUCTION: Barbell kinematics are an essential aspect of assessing weightlifting performance. This study aimed at analyzing the total variability of time series barbell kinematics during repeated lifts in the snatch and the clean and jerk at submaximal and maximal barbell loads. METHODS: In a test-retest design, seven male weightlifters lifted submaximal [85% planned one-repetition maximum (1RMp)] and maximal (97% 1RMp) loads in the snatch and the clean and jerk during training. Barbell trajectory, vertical velocity, and vertical acceleration were determined using video analysis. Standard error of measurement (SEM), intraclass correlation coefficient (ICC), and smallest real difference (SRD) were used to determine the total variability during the lifts. Hedge's g effect size was used to assess differences in SEM between submaximal and maximal loads. RESULTS: The main findings indicated that variability—in particular for the barbell velocity—was lower at maximal compared to submaximal barbell loads (g = 0.52–2.93). SEM of time series data showed that variability increased in the snatch and the clean and jerk from the 1st pull/dip to the catch position irrespectively of the barbell load. DISCUSSION: This study presents values of total variability of time series barbell kinematics during the snatch, the clean, and the jerk. Further, the SRD can be used to evaluate changes in barbell kinematics in response to training. In addition, when interpreting barbell kinematics, coaches should take into account that the variability of barbell kinematics can vary depending on the exercise and the barbell load. Frontiers Media S.A. 2023-09-13 /pmc/articles/PMC10534034/ /pubmed/37780124 http://dx.doi.org/10.3389/fspor.2023.1264280 Text en © 2023 Sandau, Langen and Nitzsche. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (https://creativecommons.org/licenses/by/4.0/) . The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Sports and Active Living Sandau, Ingo Langen, Georg Nitzsche, Nico Variability of time series barbell kinematics in elite male weightlifters |
title | Variability of time series barbell kinematics in elite male weightlifters |
title_full | Variability of time series barbell kinematics in elite male weightlifters |
title_fullStr | Variability of time series barbell kinematics in elite male weightlifters |
title_full_unstemmed | Variability of time series barbell kinematics in elite male weightlifters |
title_short | Variability of time series barbell kinematics in elite male weightlifters |
title_sort | variability of time series barbell kinematics in elite male weightlifters |
topic | Sports and Active Living |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10534034/ https://www.ncbi.nlm.nih.gov/pubmed/37780124 http://dx.doi.org/10.3389/fspor.2023.1264280 |
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